中文摘要：本文从坦桑尼亚三个不同农业生态区选取了玉米收获后不同时间点（收获期、收获后6个月、收获后12个月）的101个玉米粥样本， 采用LC-MS/MS技术测定玉米粥中的9种真菌毒素（黄曲霉毒素B1、黄曲霉毒素B、aflatoxin G（1）、aflatoxin G（2）、伏马菌素B1、伏马菌素B2、脱氧雪腐镰刀菌烯醇（DON）、赭曲霉毒素A（OTA）和zearaleneone（玉米赤霉烯酮））。检测结果发现：不同季节不同农业生态区的玉米霉菌毒素污染程度不同，坦桑尼亚地区玉米粥中多种霉菌毒素的发生率较高，需要特别注意对儿童健康的影响。
外文摘要：Residents of certain areas of Tanzania are exposed to mycotoxins through the consumption of contaminated maize based foods. In this study, 101 maize based porridge samples were collected from villages of Nyabula, Kikelelwa and Kigwa located in different agro-ecological zones of Tanzania. The samples were collected at three time points (time point 1, during maize harvest; time point 2, 6 months after harvest; time point 3, 12 months after harvest) over a 1-year period. Ultra-performance liquid chromatography tandem mass spectrometry (UPLC-MS/MS) was used to detect and quantify 9 mycotoxins: aflatoxin B-1 (AFB(1)), aflatoxin B-2 (AFB(2)), aflatoxin G(1) (AFG(1)), aflatoxin G(2) (AFG(2)), fumonisin B-1 (FB1), fumonisin B-2 (FB2), deoxynivalenol (DON), ochratoxin A (OTA) and zearaleneone (ZEN) in the samples following a QuEChERS extraction method. Eighty two percent of samples were co-contaminated with more than one group of mycotoxins. Fumonisins (FB1+FB2) had the highest percentage occurrence in all 101 samples (100%) whereas OTA had the lowest (5%). For all three villages the mean concentration of FB1 was lowest in samples taken from time point 2. Conversely, In Kigwa village there was a distinct trend that AFB(1) mean concentration was highest in samples taken from time point 2. DON concentration did not differ greatly between time points but the percentage occurrence varied between villages, most notably in Kigwa where 0% of samples tested positive. ZEN occurrence and mean concentration was highest in Kikelelwa. The results suggest that mycotoxin contamination in maize can vary based on season and agro-ecological zones. The high occurrence of multiple mycotoxins found in maize porridge, a common weaning food in Tanzania, presents a potential increase in the risk of exposure and significant health implications in children. (c) 2016 Published by Elsevier Ltd.
外文关键词：Mycotoxin；Aflatoxin；Fumonisin；Deoxynivalenol；Zearalenone；Ochratoxin A；Maize；Tanzania；Africa；LC-MS/MS；Occurrence；Contamination
作者：Patrick A. Geary； Gaoyun Chen；Martin E. Kimanya
作者单位： Institute for Global Food Security, School of Biological Sciences, Queen's University Belfast, Belfast BT9 5AG, UK.
期刊名称：FOOD CONTROL
期刊影响因子：3.388
出版年份：2016
出版刊次：10
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